– 167 –
In some cases
, it ma
y be difficult to chec
k the leakage of clogging in the f
ollo
wing condition of refr
iger
ant
stagnation in lo
w ambient temper
a
ture condition.
In this case
, tak
e
a longer oper
ating time pr
ior to chec
k
.
(Cr
iter
ion:
Discharge temper
ature of
TD1,
TD2 and
TD3 are 140˚F (60˚C) or higher)
(*1) Chec
king leakage and clogging on solenoid v
alv
es
a) Leakage chec
k f
or SV3A v
alv
e (F
or m
ultiple outdoor unit system)
•T
ur
n off the po
w
e
r supply
, tak
e off connector of SV3A v
a
lv
e
, and then star
t a test oper
ation after
po
w
er-ON.
• Chec
k the temper
ature change at secondar
y side of SV3A v
alv
e dur
ing oper
ation .
((1) in the figure
.)
→
If temper
ature is r
a
ised, leakage occurs in the SV3A v
a
lv
e
. Replace SV3A v
a
lv
e
.
b) Leakage chec
k f
or SV3C v
alv
e
• T
u
rn
off the po
w
e
r supply
, tak
e off connector of SV3C v
a
lv
e
, and then star
t a test oper
ation after
po
w
er-ON.
• After oper
ation f
o
r se
ve
ral min
utes
, chec
k temper
ature at secondar
y side of SV3C v
alv
e
. ((2) in the
figure
.)
→
If temper
a
ture is high (equiv
a
lent to discharge temper
ature
TD), leakage occurs in the SV3C v
a
lv
e
.
Replace SV3C v
a
lv
e
.
(Ev
en if leakage does not occur in the SV3C v
a
lv
e
, temper
ature of SV3C v
alv
e at secondar
y side
r
ises dur
ing oper
ation.
But the temper
ature is lo
w
e
r than
TD when there is no leakage
.)
c) Leakage chec
k f
or SV3F v
alv
e (F
or m
ultiple outdoor unit system)
•
T
u
rn
off the po
w
e
r supply
, tak
e
off connector of SV3F v
a
lv
e
, and then star
t a test oper
a
tion after
po
w
er-ON.
• Chec
k the temper
a
ture change at secondar
y side of SV3F v
a
lv
e dur
ing oper
ation .
((3) in the figure
.)
• If temper
ature is r
aised, leakage occurs in the SV3A v
a
lv
e
. Replace SV3A v
alv
e
.
→
If temper
ature is r
a
ised, leakage occurs in the SV3A v
alv
e
. Replace SV3A v
a
lv
e
.
d) Clogging chec
k f
or SV3B v
alv
e (F
or m
ultiple outdoor unit system)
• While outdoor unit is oper
ated, set up SW01/02/03 = [2] [1] [3] (7-segment displa
y [Hr] [...
...
...]), and
push SW04 f
or 2 seconds or more
.
• Set up SW02 = [10], and tur
n
on SV3A, SV3B
, SV3C v
a
lv
es
. (7-segment displa
y
[Hr] [...
3 -])
•
While outdoor units are oper
ating, chec
k temper
ature change at secondar
y
side of SV3B v
alv
e
. ((4) in
the figure
.)
• If temper
ature does not r
ise (equiv
alent to suction temper
ature), it is a clogging of SV3B v
a
lv
e
.
→
Replace SV3B v
alv
e
.
e) Clogging f
or SV3E v
alv
e
Reset the po
w
e
r supply
.
↓
Using "V
alv
e f
o
rced open/close function" of the outdoor unit, chec
k ON/OFF oper
ation (Sound, coil
surf
ace temp up) of SV3E v
alv
e is perf
or
med.
↓
Star
t test oper
ation in COOL or HEA
T mode
.
↓
After oper
ation f
or se
v
e
ra
l min
utes
, chec
k the pipe temper
ature at the secondar
y side of SV3E v
alv
e
whether temper
ature changes or not.
If it is equiv
alent to outside temper
ature
, clogging of SV3E is
considered.
((5) in the figure
.)
(Ref
erence)
If SV3E v
alv
e is clogged, temper
ature does not change at all sensors (TK1,
TK2,
TK3,
TK4 and
TK5).
f) Clogging chec
k f
or SV3F v
alv
e
• While outdoor unit is oper
ated, set up SW01/02/03 = [2] [1] [3] (7-segment displa
y [Hr] [...
...
...]), and
push SW04 f
or 2 seconds or more
.
• Set up SW02 = [8], and tur
n
on SV3C
, SV3E, SV3F v
alv
es
. (7-segment displa
y [Hr] [...
3 C])
•
While outdoor units are oper
ating, chec
k temper
ature change at secondar
y
side of SV3F v
a
lv
e
. ((3) in
the figure
.)
• If temper
ature does not r
ise (equiv
alent to suction temper
ature), it is a clogging of SV3F v
alv
e
.
Replace SV3F v
a
lv
e
.
(*2) Chec
king the oil retur
n circuit from oil separ
ator and clogging in
SV3D v
alv
e
a) Oil retur
n circuit
• While outdoor unit is oper
ating, chec
k temper
a
ture (secondar
y side of capillar
y) on oil retur
n
circuit.
((6) in the figure
.)
• If temper
a
ture is lo
w equiv
alent to suction temper
ature), a clogging of str
ainer of oil retur
n circuit or
→
capillar
y
is considered.
Replace the clogged par
t.
b) Clogging chec
k f
or SV3D v
alv
e
• While outdoor unit is oper
ated, set up SW01/02/03 = [2] [1] [3] (7-segment displa
y [Hr] [...
...
...]), and
push SW04 f
or 2 seconds or more
.
• Set up SW02 = [
9
], and tur
n on SV3D v
a
lv
e
. (7-segment displa
y [Hr] [...
3 d])
• If temper
ature is lo
w at secondar
y side of the v
alv
e or it does not change
, clogging of v
alv
e
, capillar
y,
or str
ainer is considered.
((7) in the figure
.) Replace the clogged par
t.
Summary of Contents for MMY-MAP0724FT6UL
Page 35: ...35 3 5 Parts Layout in Outdoor Unit 072 type Model MMY MAP0724FT...
Page 36: ...36 096 120 type Model MMY MAP0964FT MAP1204FT...
Page 37: ...37 3 6 Parts Layout in Inverter Assembly 208 230V model MMY MAP0724FT9UL...
Page 38: ...38 208 230V model MMY MAP0964FT9UL MMY MAP1204FT9UL...
Page 39: ...39 460V model MMY MAP0724FT6UL...
Page 40: ...40 460V model MMY MAP0964FT6UL MMY MAP1204FT6UL...
Page 41: ...41 3 7 Outdoor Inverter print circuit board 3 7 1 Interface P C board MCC 1606...
Page 42: ...42 3 7 2 Inverter P C board for compressor MCC 1595 A3 IPDU For 208 230V model MMY MAP 4FT9UL...
Page 43: ...43 3 7 3 Inverter P C board for compressor MCC 1596 A3 IPDU For 460V model MMY MAP 4FT6UL...
Page 44: ...44 3 7 4 Inverter P C board for fan motor MCC 1610 FAN IPDU...
Page 45: ...45 3 7 5 Noise Filter P C board MCC 1608 A B For 208 230V model MMY MAP 4FT9UL...
Page 46: ...46 3 7 6 Noise Filter P C board MCC 1625 A B C For 460V model MMY MAP 4FT6UL...
Page 195: ...195...
Page 197: ...197...
Page 257: ...257 15 EXPLODED DIAGRAM PARTS LIST Outdoor unit 15 1 MMY MAP0724FT9UL...
Page 258: ...258 15 1 MMY MAP0724FT9UL...
Page 262: ...262 15 1 Inverter Assembly MMY MAP0724FT9UL...
Page 264: ...264 15 2 MMY MAP0964FT9UL MMY MAP1204FT9UL...
Page 265: ...265 15 2 MMY MAP0964FT9UL MMY MAP1204FT9UL...
Page 269: ...269 15 2 Inverter Assembly MMY MAP0964FT9UL MMY MAP1204FT9UL...
Page 271: ...271 15 3 MMY MAP0724FT6UL...
Page 272: ...272 15 3 MMY MAP0724FT6UL...
Page 276: ...276 15 3 Inverter Assembly MMY MAP0724FT6UL...
Page 278: ...278 15 4 MMY MAP0964FT6UL MMY MAP1204FT6UL...
Page 279: ...279 15 4 MMY MAP0964FT6UL MMY MAP1204FT6UL...
Page 283: ...283 15 4 Inverter Assembly MMY MAP0964FT6UL MMY MAP1204FT6UL...